Attached Link: Viewer

My go to tool for any texture project is Genetia. Here is the viewer to check it out. There are several downlaodable GTX packs; node texture builds, there as well as a forum full. 

I'm about the stingyest of the genetica users lol I have gigs of GTX builds, and most GTXs are under 50 meg. Of coarse most are rather macabre.

Are you using a bump or normal map? Seems like you would have the same issue with moon dust I have with snow, it's more the bump then the texture that make it look right.